[R] Seeking Assistance: Plotting Sea Current Vectors in R

Jim Lemon drj|m|emon @end|ng |rom gm@||@com
Wed Jul 26 00:58:57 CEST 2023

Hi Kostas,
The function vectorField in the plotrix package may do what you want.
See the example.


On Tue, Jul 25, 2023 at 9:30 PM konstantinos christodoulou
<konstantinos.christodoulou1 using gmail.com> wrote:
> Dear Rcommunity,
> I hope this email finds you well. I am writing to seek your assistance with
> a data visualization problem I am facing while working with R.
> Problem Description:
> I have a dataframe named "df" containing the following columns:
> "longitude", "latitude", "sea_currents_mag", and "sea_currents_direction".
> The dataframe includes sea current estimations, with information about
> magnitude (m/s) and direction (degrees) at various longitude and latitude
> coordinates. The study domain covers the Eastern Mediterranean Sea (23E to
> 36W) and extends from 31S to 37N. It is important to note that the
> longitude and latitude coordinates are not evenly spaced across the domain.
> Objective: I am seeking guidance on how to create a plot that visualizes
> the sea current vectors (arrows) at each coordinate. Additionally, if
> possible, I would like the borders of the surrounding countries to be
> included in the plot to provide geographic context.
> Specific Requests:
>    1. Help with plotting sea current vectors (arrows) based on
>    "sea_currents_mag" and "sea_currents_direction" at each corresponding
>    longitude and latitude coordinate.
>    2. Assistance with including the borders of the surrounding countries in
>    the plot to provide geographic context.
> I would highly appreciate any advice, code examples, or packages that could
> assist me in achieving this visualization goal.
> Thank you very much for taking the time to read my email, and I look
> forward to any assistance you can provide.
> Best regards,
> Kostas
>         [[alternative HTML version deleted]]
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